Synthesis, characterization and properties of novel thermally stable poly(urethane-oxazolidone) elastomers |
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Authors: | Hamid Yeganeh Sadegh Jamshidi Pejman Hojati Talemi |
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Institution: | Polyurethane Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran |
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Abstract: | Oxazolidone-incorporated polyurethane elastomers based on hydroxyl terminated polycaprolactone, were synthesized and characterized. Reaction of epoxy-terminated polyurethane with isocyanate librated from a blocked polyisocyanate was the strategy followed. The reaction condition was optimized through preparation of model oxazolidones. Epoxy-terminated polyurethanes were prepared from reaction of glycidol with NCO-terminated polyurethane prepolymers and curing agent was synthesized from the reaction of trimethylol propane, toluene diisocyanate and N-methyl-aniline. Incorporation of heterocyclic oxazolidone groups into the polyurethane backbone caused improvements in thermal and mechanical properties. Investigation of structure-property relationship for prepared elastomers showed that the main determining factors for observed properties were crosslink density, crystallinity and content of oxazolidone rings. |
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Keywords: | Polyurethane Oxazolidone Elastomer Thermal stability |
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